Update changelog

Author: sloria

CHANGELOG.rst

@@ -18,7 +18,7 @@ Bug fixes:
 Documentation:
 
 - Add :doc:`upgrading guides <upgrading>` for 3.24 and 3.26 (:pr:`2780`).
-- Various documentation improvements (:pr:`2757`, :pr:`2759`, :pr:`2765`, :pr:`2774`, :pr:`2778`, :pr:`2783`).
+- Various documentation improvements (:pr:`2757`, :pr:`2759`, :pr:`2765`, :pr:`2774`, :pr:`2778`, :pr:`2783`, :pr:`2796`).
 
 Deprecations: